A simple arrangement of wheel-shaped copper microstrip antenna is presented for operation in the 24 GHz frequency band. In this structure, a coaxial feed probe was utilized to generate vertical polarization, and a wheel-shaped microstrip with four coupling arms was used to produce horizontal polarization. An antenna comprising of two copper sheets assembled between the air-substrate was manufactured and characterized experimentally. The measured and simulated values are in close compliance with each other. A stable in-band omnidirectional radiation patterns were achieved thereby ensuring a proper combination of the field vectors from the feed probe and the radiating arms. The antenna occupied an overall footprint of 8 mm to fruitfully realize −10 dB impedance bandwidth >3 GHz and radiation efficiency of ~100%. In the operating frequency band from 22.5 to 25.7 GHz, axial ratio <2.7 dB, gain <6 dBic and specific absorption rate (SAR) <0.06 W/kg was maintained. Furthermore, the integration of simple geometry and air-substrate significantly reduced the fabrication cost of the antenna system. Hence, the antenna is a promising candidate for 5G millimeter (mmWave) wireless communications.

提出了一种轮状铜微带天线的简单布置，以便在24 GHz频带中工作。在这种结构中，同轴馈电探头用于产生垂直极化，而带有四个耦合臂的轮状微带则用于产生水平极化。制造了天线，该天线由组装在空气基板之间的两个铜片组成，并进行了实验表征。测量值和模拟值彼此非常一致。实现了稳定的带内全向辐射方向图，从而确保了来自馈电探针和辐射臂的场矢量的正确组合。天线占用的总面积为8 mm，可有效实现-10 dB的阻抗带宽> 3 GHz，并且辐射效率约为100％。在22.5至25.7 GHz的工作频带中，保持了轴比<2.7 dB，增益<6 dBic和比吸收率（SAR）<0.06 W / kg。此外，简单几何形状和空气基质的集成大大降低了天线系统的制造成本。因此，该天线是5G毫米（mmWave）无线通信的有希望的候选者。